CN204386722U - A kind of two-stroke layered-scavenging engine - Google Patents
A kind of two-stroke layered-scavenging engine Download PDFInfo
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- CN204386722U CN204386722U CN201420808159.1U CN201420808159U CN204386722U CN 204386722 U CN204386722 U CN 204386722U CN 201420808159 U CN201420808159 U CN 201420808159U CN 204386722 U CN204386722 U CN 204386722U
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- air
- scavenging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a kind of two-stroke layered-scavenging engine, mainly comprise air scavenging parts and mixed gas scavenging parts.Described air scavenging parts are primarily of air air storing cavity (10) and air scavenging passage (15) composition of being located at body (4) side inwall, described air scavenging passage (15) two ends communicate with the air scavenging mouth (16) and air air storing cavity (10) that are arranged on cylinder body (2) side inwall respectively, described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk (17,19), described mixed gas scavenge trunk (17,19) being arranged on the inwall of cylinder body (2), is closed cavity structure.The utility model is set to the layered scavenging technological scheme with independent air scavenging air belt, significantly reduces the short-circuit loss of incoming mixture, reduces the noxious emission of motor, energy-saving and cost-reducing.
Description
Technical field
The utility model relates to
technical field of engines, specificallyrelate to a kind of two-stroke layered-scavenging engine.
Background technique
High speed small displacement two stroke engine has that mechanical efficiency is high, specific power is large and low cost and other advantages, in fields such as agricultural, forestry, building, garden plant protection and movement entertainments in occupation of the huge market space.But two-stroke gasoline engine is owing to being subject to Economy and the impact, particularly HC+NO of the factor such as emission performance is poor
xwith the discharge of CO, cause serious environmental pollution, its development receives again certain restriction.In recent years, under the dual-pressure of the energy and environmental problem, national governments have put into effect more and more stricter Abgasgesetz respectively.In order to reduce the noxious emission of two stroke engine, make it to meet Abgasgesetz standard, further R and D two stroke engine technology has very important society and economic implications.
Model utility content
The purpose of this utility model is to overcome the deficiency in existing two stroke engine technology, there is provided " a kind of two-stroke layered-scavenging engine ", the utility model reasonable in design, low manufacture cost, a kind of easy to install, reduce noxious emission, effectively improve the two-stroke layered-scavenging engine of engine thermal efficiency.
To achieve these goals, the utility model is achieved through the following technical solutions: a kind of two-stroke layered-scavenging engine, main technological scheme is, mainly comprise: cylinder body 2, body 4, crankcase 5, step piston 6, bent axle 8, air scavenging parts and mixed gas scavenging parts, described air scavenging parts form primarily of the air air storing cavity 10 and air scavenging passage 15 being located at body 4 side inwall, and described air scavenging passage 15 two ends communicate with the air scavenging mouth 16 and air air storing cavity 10 that are arranged on cylinder body 2 side inwall respectively.Described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk 17,19, described mixed gas scavenge trunk 17,19 is arranged on the inwall of cylinder body 2, for closed cavity structure, the two ends of described mixed gas scavenge trunk 17,19 communicate with the mixed gas scavenging port 18,20 be located in cylinder 3 and crankcase 5 respectively.
Further technological scheme is, described mixed gas scavenge trunk 17,19 at least arranges one group, and symmetry is established
Put on the inwall of cylinder body 2, air scavenging passage 15 at least arranges one, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19.
Further technological scheme is, is made up of the pump chamber 7 of enclosed construction the outer wall of described step piston 6 and the inwall of cylinder body 2, described pump chamber 7 with mixed gas scavenge trunk 17,19 for isolation arranges structure.
Further technological scheme is, the lower end of cylinder body 2 and the suitable position of step piston about 6 stroke are provided with the air inlet 12 with leaf valve I, be provided with in the upper end of air air storing cavity 10 with leaf valve III and the air passageways 13 communicated with air inlet 12.
Further technological scheme is, the inwall of cylinder body 2 side is provided with relief opening 14, and the position height of described relief opening 14 is successively higher than air scavenging mouth 16, mixed gas scavenging port 18,20.
Further technological scheme is, is provided with the mixed gas inlet 22 with leaf valve II in the opposite side position of body 4.
Further technological scheme is, the size of described air scavenging mouth 1, mixed gas scavenging port 18,20 and its opening amount of mixed gas inlet 22 determined by step piston about 6 travel position.
The further 10-50% of technological scheme to be the volume-variation amount of described pump chamber 7 be motor 1 air displacement.
the utility modeltool has the following advantages:
1, the utility model reasonable in design, low manufacture cost is a kind of easy to install, the two-stroke layered-scavenging engine reducing the noxious emission of two stroke engine, save energy and reduce the cost, reduce environmental pollution, effectively improve engine thermal efficiency.
2, the utility model is set to independently air scavenging passage and mixed gas scavenge trunk, namely mixed gas and pure air are respectively by independently scavenging air belt and scavenging port enter cylinder, pure air replaces incoming mixture to complete the scavenging function in early stage, air assume responsibility for main scavenging loss, significantly reduce the short-circuit loss of incoming mixture, reduce the noxious emission of two-stroke gasoline engine, effectively improve engine thermal efficiency.
3, because being provided with relief opening on the inwall of cylinder body 2 side, the position height of described relief opening is successively higher than air scavenging mouth, mixed gas scavenging port, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19, scavenging port position arranges rationally, the cylinder wall surface that rich mixture is against away from relief opening flows, rich mixture and waste gas are kept apart, realize the technical purpose of layered scavenging, ventilation is thorough, scavenging is abundant, effectively reduce the short-circuit loss of incoming mixture further, reduce HC+NO
xwith the noxious emission of CO, energy-saving and cost-reducing, reduce environmental pollution.
4, the outer wall of step piston described in reason and the inwall of cylinder body form the pump chamber of enclosed construction, described pump
Chamber and mixed gas scavenge trunk are that isolation arranges structure, guarantee the realization of independent air scavenge trunk and mixed gas scavenge trunk technological scheme further, effectively reduce the short-circuit loss of incoming mixture.
5. structures shape set by the utility model, the volume-variation amount of described pump chamber 7 is the 10-50% of motor 1 air displacement, to ensure further to realize technical purpose of the present utility model.
6, technical solutions of the utility model enforcement to the structural complexity of motor and cost impact less.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the A-A of Fig. 1 is to schematic cross-section.
In figure: 1. motor, 2. cylinder body, 3. cylinder, 4. body, 5. crankcase, 6. step piston, 7, pump chamber, 8, bent axle, 9, connecting rod, 10, air air storing cavity, 11, leaf valve I, 12, air inlet, 13, air passageways, 14, relief opening, 15, air scavenging passage, 16, air scavenging mouth, 17,19, mixed gas scavenge trunk, 18,20, mixed gas scavenging port, 21, leaf valve II, 22, mixed gas inlet, 23, leaf valve III.
Embodiment
Below by non-limiting example, set forth the utility model further, understand the utility model.
embodiment 1
The utility model as shown in Figure 1, Figure 2 shown in, a kind of two-stroke layered-scavenging engine, main technological scheme
Be, mainly comprise: cylinder body 2, body 4, crankcase 5, step piston 6, bent axle 8, air scavenging parts and mixed gas scavenging parts, described air scavenging parts form primarily of the air air storing cavity 10 and air scavenging passage 15 being located at body 4 side inwall, and described air scavenging passage 15 two ends communicate with the air scavenging mouth 16 and air air storing cavity 10 that are arranged on cylinder body 2 side inwall respectively.Described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk 17,19, described mixed gas scavenge trunk 17,19 is arranged on the inwall of cylinder body 2, for closed cavity structure, the two ends of described mixed gas scavenge trunk 17,19 communicate with the mixed gas scavenging port 18,20 be located in cylinder 3 and crankcase 5 respectively.
Described mixed gas scavenge trunk 17,19 arranges two groups, and be symmetricly set on the inwall of cylinder body 2, air scavenging passage 15 arranges one, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19.
Be made up of the pump chamber 7 of enclosed construction the outer wall of described step piston 6 and the inwall of cylinder body 2, described pump chamber 7 with mixed gas scavenge trunk 17,19 for isolation arranges structure.
The lower end of cylinder body 2 and the suitable position of step piston about 6 stroke are provided with the air inlet 12 with leaf valve I, be provided with in the upper end of air air storing cavity 10 with leaf valve III and the air passageways 13 communicated with air inlet 12.
The inwall of cylinder body 2 side is provided with relief opening 14, and the position height of described relief opening 14 is successively higher than air scavenging mouth 16, mixed gas scavenging port 18,20.
The mixed gas inlet 22 with leaf valve II is provided with in the opposite side position of body 4.
The size of described air scavenging mouth 1, mixed gas scavenging port 18,20 and its opening amount of mixed gas inlet 22 determined by step piston about 6 travel position.
The volume-variation amount of described pump chamber 7 is the 10-50% of motor 1 air displacement.
Further illustrate layered scavenging process of the present utility model below.
The utility model application step piston and independently air scavenging road realize the layered scavenging of two stroke engine, the large-diameter portion of piston divides formation an air pump, pressure trend in its pressure trend and crankcase is contrary, namely during intake stroke, when connecting rod 9 drives piston stroking upward by bent axle 8, pump chamber internal pressure raises, and at scavenging stroke, descent of piston, pressure drop, therefore be provided with an air storing cavity pressurized air pumped into during intake stroke is temporarily stored, enter cylinder at scavenging stroke by air scavenging road.At mixed gas intake stroke, piston upwards, the air in compressed air pump enters air storing cavity by leaf valve; At mixed gas scavenging stroke, when descent of piston, suck air by the leaf valve of air inlet, now store pressurized air in air storing cavity, leaf valve between air storing cavity and air pump cuts out, and when air scavenging mouth is opened, the pure air in air storing cavity enters cylinder by air scavenging road.By rationally arranging the parameter of air scavenging mouth, controlling air and entering time and the path of cylinder, can realize utilizing air to complete the function of cleaning waste gas, make incoming mixture and waste gas isolated, thus reduce the short-circuit loss of incoming mixture.
In sum, the layered scavenging technology that the utility model and air and mixed gas share scavenging air belt is compared, the utility model is set to the layered scavenging technological scheme with independent air scavenging air belt, scavenging port position arranges rationally, significantly reduce the short-circuit loss of incoming mixture, reduce the noxious emission of motor, energy-saving and cost-reducing, minimizing environmental pollution, by enforcement of the present utility model, the emission performance of motor can meet U.S. EPA phase III standard and European second stage standard.
Claims (8)
1. a two-stroke layered-scavenging engine, mainly comprise: cylinder body (2), body (4), crankcase (5), step piston (6), bent axle (8), air scavenging parts and mixed gas scavenging parts, it is characterized in that, described air scavenging parts are primarily of air air storing cavity (10) and air scavenging passage (15) composition of being located at body (4) side inwall, described air scavenging passage (15) two ends communicate with the air scavenging mouth (16) and air air storing cavity (10) that are arranged on cylinder body (2) side inwall respectively, described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk (17, 19), described mixed gas scavenge trunk (17, 19) inwall of cylinder body (2) is arranged on, for closed cavity structure, described mixed gas scavenge trunk (17, 19) two ends respectively with the mixed gas scavenging port (18 be located in cylinder (3), 20) and crankcase (5) communicate.
2. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, described mixed gas scavenge trunk (17,19) one group is at least arranged, be symmetricly set on the inwall of cylinder body (2), air scavenging passage (15) at least arranges one, the interchangeable setting in spatial position of air scavenging passage (15), mixed gas scavenge trunk (17,19).
3. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, the pump chamber (7) of enclosed construction is made up of the outer wall of described step piston (6) and the inwall of cylinder body (2), described pump chamber (7) and mixed gas scavenge trunk (17,19) arrange structure for isolation.
4. a kind of two-stroke layered-scavenging engine according to claim 3, it is characterized in that, be provided with the air inlet (12) with leaf valve I (11) in the suitable position of stroke up and down at the lower end of cylinder body (2) and step piston (6), be provided with in the upper end of air air storing cavity (10) with leaf valve III (23) and the air passageways (13) communicated with air inlet (12).
5. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, the inwall of cylinder body (2) side is provided with relief opening (14), and the position height of described relief opening (14) is successively higher than air scavenging mouth (16), mixed gas scavenging port (18,20).
6. a kind of two-stroke layered-scavenging engine according to claim 1, is characterized in that, is provided with the mixed gas inlet (22) with leaf valve II (21) in the opposite side position of body (4).
7. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, the size of described air scavenging mouth (16), mixed gas scavenging port (18,20) and mixed gas inlet (22) its opening amount by step piston (6) up and down travel position determined.
8. a kind of two-stroke layered-scavenging engine according to claim 3, is characterized in that, the volume-variation amount of described pump chamber (7) is the 10-50% of motor (1) air displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420808159.1U CN204386722U (en) | 2014-12-19 | 2014-12-19 | A kind of two-stroke layered-scavenging engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420808159.1U CN204386722U (en) | 2014-12-19 | 2014-12-19 | A kind of two-stroke layered-scavenging engine |
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| Publication Number | Publication Date |
|---|---|
| CN204386722U true CN204386722U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420808159.1U Expired - Fee Related CN204386722U (en) | 2014-12-19 | 2014-12-19 | A kind of two-stroke layered-scavenging engine |
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| CN (1) | CN204386722U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500212A (en) * | 2014-12-19 | 2015-04-08 | 江苏林海动力机械集团公司 | Two-stroke stratified scavenging engine |
| CN108757212A (en) * | 2018-08-22 | 2018-11-06 | 江苏心源航空科技有限公司 | A kind of engine crankcase |
| CN109488471A (en) * | 2018-12-20 | 2019-03-19 | 南京理工大学 | A kind of free-piston engine stable operation course control method for use |
| CN113107661A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Layered scavenging two-stroke engine |
-
2014
- 2014-12-19 CN CN201420808159.1U patent/CN204386722U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500212A (en) * | 2014-12-19 | 2015-04-08 | 江苏林海动力机械集团公司 | Two-stroke stratified scavenging engine |
| CN108757212A (en) * | 2018-08-22 | 2018-11-06 | 江苏心源航空科技有限公司 | A kind of engine crankcase |
| CN109488471A (en) * | 2018-12-20 | 2019-03-19 | 南京理工大学 | A kind of free-piston engine stable operation course control method for use |
| CN109488471B (en) * | 2018-12-20 | 2021-09-03 | 南京理工大学 | Method for controlling stable operation process of free piston engine |
| CN113107661A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Layered scavenging two-stroke engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20171219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |